PDF malware analysis — malicious · 252922f88dbfd472

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: f93e8e384d7c13e651312de7bff3c1b5 SHA-1: 2a4a1fa87052d179c1c2ce0d9702e633e0b309fd SHA-256: 252922f88dbfd472ac59cba3823a940e71c7713aa928b8a52e1541073e9e503d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious content. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, suggests an attempt to execute code. ClamAV detection of 'Win.Trojan.Agent-36166' further confirms its malicious nature and provides a specific family identifier. The embedded JavaScript likely downloads and executes a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `768d3d6363e1a270d86809d3d538c51c516ca6a7cdab0077d1f2df81ec1fb922`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75080 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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